Get practical advice on writing and designing an environmental report that incorporates sustainability principles. This manual was written as part of a research project conducted by the International Network for Environmental Management in 2000-2001 and is designed for small and medium-size companies. Focusing on the economic interests of companies -- and on the need for reliable and convincing communication -- it offers insightful information on identifying target groups for a report, collecting information, and addressing the issue of credibility. Much of the information is based on the experiences of four leading German companies that participated in the INEM research project. Not convinced? Also find an argument supporting the practice of sustainability reporting.